Evaluation or Analysis of a Live or a Recorded Video Sequence: An Example from an Analysis of Sports Videos

Background. Since 2006, the Faculty of Sport Sciences of Montpellier students must build 4 specific applications with general and specific software, in order to train them in the use of sportive video analysis,. These ICT skills are part of those defined by the Ministry of Higher Education, and the feature of these applications is the use of "delayed videos" analysis. Students' learning journey is supported by online tutorials. To consider the ever-increasing efficiency of new technologies and go further in video analysis, we have added a step (a fifth application): the use of "live videos" analysis excluding the backtracking of video. The benefits of this type of work can help decision-making in everyday life and therefore concern the world of sport. Problem. The purpose of this work was to observe students analyzing a recorded video sequence excluding video backtracking, as if it were live, as a coach. The feasibility conditions of such an experiment led us to study a judo combat by appreciating or estimating the interactions between different criteria as a coach. Method. After training, Masters students (n=12), who specialized in video analysis and in judo performance, analyzed (they studied the same bout three times) the balance of power (subjective criterion) between two judokas. The process required the student observers to identify whether a judoka was "dominant, i.e.: in a favorable position to win" or "dominated" whilst managing his/ her actions in "programmed/conscious" or "automatic, i.e.: reflex organization" modes. Nonparametric Kolmogorov Smirnov and Wilcoxon tests were used to analyze the data collected by the students. Conclusions. These tests indicated that the analyses were identical and stable at the intra-observer (p= [0.095: 0.999], p= [0.219: 1.0]) and group levels (p=0.224; p=0.406). We propose to include this methodology of analysis in Masters' students training programs and develop these live analyses for coaches, teachers or referees.